* New SchedulerExtender enables users to implement custom
out-of-(the-scheduler)-process scheduling predicates and priority functions,
for example to schedule pods based on resources that are not directly managed

* Add a new kubelet endpoint for serving first-class resource metrics ([#73946](https://github.com/kubernetes/kubernetes/pull/73946), [@dashpole](https://github.com/dashpole))
* Deprecate AWS, Azure, GCE and Cinder specific volume limit predicates. ([#74544](https://github.com/kubernetes/kubernetes/pull/74544), [@gnufied](https://github.com/gnufied))

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